Regarding the first, I was pretty impressed when I plugged my phone into my Ubuntu machine for the first time and up popped two Nautilus windows giving me read access to my entire iphone5 filesystem.
I'm an avid user of Garage Band for iOS and the method Apple gives you to transfer songs from the phone are surprisingly inadequate.
Linux also assisted with copying all the songs from my girlfriends iPod, which was denied by iTunes due to some DRM silliness.
So, with Linux coming to the rescue I have found less of a desire to jailbreak these devices.
I'm an avid user of Garage Band for iOS and the method Apple gives you to transfer songs from the phone are surprisingly inadequate.
Linux also assisted with copying all the songs from my girlfriends iPod, which was denied by iTunes due to some DRM silliness.
So, with Linux coming to the rescue I have found less of a desire to jailbreak these devices.